添加如下一行

• set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pthread")

具體的例子

cmake_minimum_required(VERSION 3.17) project(mutex_learn)set(CMAKE_CXX_STANDARD 14)set(BOOST_ROOT "/usr/local/include/boost") #添加頭文件搜索路徑 include_directories(/usr/local/include) #添加庫文件搜索路徑 link_directories(/usr/local/lib)add_executable(mutex_learn main.cpp) set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pthread") #set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -lrt")target_link_libraries(mutex_learn boost_thread boost_system rt)

完整代碼

#include <sys/shm.h> #include <iostream> #include <unistd.h> #include <pthread.h>void * child1(void *arg){pthread_t tid = pthread_self();printf("1 thread %lu \n",tid);}int main(int argc,char* argv[]) {int result{};pthread_t a_thread{};pthread_t tid = pthread_self();printf("mean thread %lu \n",tid);result = pthread_create(&a_thread, nullptr,child1, nullptr);if (result !=0){printf("Thread create failed!");}return 0; }

總結(jié)

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